We leave the system to idle on the Windows 10 desktop for 5 minutes before taking a reading. For CPU load results we run AIDA64 CPU, FPU, Cache and Memory stress tests and take a reading after 5 minutes. The power consumption of our entire test system (at the wall) is shown in the chart.
Power consumption is in line with non-overclocked Z370 motherboards, perhaps a little lower because of the slower memory. There is scope to reduce power draw further by “undervolting” the CPU but it is certainly not necessary, the auto-voltage behaviour is adequate for safe and economical 24/7 usage.